I read:
but i'm interested in controlling lights w/ different parameters...
well if you are willing to put some work (and budget) into it, there's
christian klippels usb I/O box -> http://multio.mamalala.de/
I wrote a [dmx] external (linux only) a while ago for use with this
driver -> http://llg.cubic.org/dmx4linux/
(the box usually hosting it is down - but it should be up and running
in a more stable place RSN[tm] - and you can always drop me a line)
olaf matthes wrote a dmx-usb object which is probably in cvs.
is there a way to control those usb-powered lights using PD?
hmmm .. never had any of those but I suspect that all you can do with them is basically (running as root) telling [shell] to run scripts like:
on.sh: modprobe uhci-hcd # or ohci whatever your controller
off.sh: rmmod uhci-hcd # see above
(yes I'm aware that's a bit brute force ;)
I don't think those are meant to be controlled - but please prove me wrong here.
HTH
x